Issue [SOLVED] "Empty folder" error

[otoikat]

Hey everyone, I'm trying to make a mod to change Haleys portraits, it is my first time modding any game so I don't really know what could be wrong.
I will include in the thread a picture of the SMAPI log and an image of the assets folder, confirming that it is not empty.

 

[otoikat]

I forgot to include the content.json and manifest.json files, while researching, I saw someone saying that the issue might be that the .json files were actually .txt files, but I already checked and they really are .json files.

 

[otoikat]

I figured out the error: in the content.json I forgot to add the .png in the file names.